Unseen to the naked eye and often undetectable electronically, clear air turbulence (CAT) often strikes without warning and can toss unbuckled passengers, cabin crew and objects around, sometimes violently. In the U.S. alone, the financial tally for such upsets runs $200+ million annually, and doesn’t account for the pain and loss of productivity that results, nor the time lost to aircraft inspection and maintenance.  According to NTSB Senior Meteorologist Donald Eick, turbulence ...

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